FR4 Automobile High Resistance Carbon Oil PCB

Using carbon ink in place of hard gold is an option that offers lower costs and high robustness. According to XD, using carbon ink reduces material costs by replacing gold with carbon, and reduces process costs by “replacing the electrolytic bath with a simple screen-printing process.” And regarding robustness, “Tests have shown that a typical carbon ink is hard enough to withstand >1 million pushbutton operations (keypad) or 100 insertion operations ... (edge connector) without showing wear or increased resistance.”